BirdAnalyst
Species · BCR 34 · BBS 2025 Release · 1966–2024

Eastern Bluebird In Sierra Madre Occidental

All regionsSierra Madre OccidentalForest birds

Eastern Bluebird in Sierra Madre Occidental has fallen sharply: down 64% on the route-weighted index since 1970.

-64%Since 1970
4Routes In Region
52Years

Notable Signals

long arc declinecomputed index

Eastern Bluebird has fallen sharply in Sierra Madre Occidental: down 64% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Eastern Bluebird in Sierra Madre Occidental is projected to fall about 100% by 2028 — from 0.27 in 2023 to a central estimate of 0.00 (95% range 0.00–1.3). A 5-year backtest shows a typical error of ±162.1%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2028
0.00Projected 2028 index
0.00–1.395% range
±162.1%Backtest error
19682028
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20240.000.001.3
20250.000.001.3
20260.000.001.3
20270.000.001.3
20280.000.001.3

Routes In Sierra Madre Occidental

Routes recording Eastern Bluebird in Sierra Madre Occidental.
PatagoniaARIZONA62023
Peña BlancaARIZONA12019
SunizonaARIZONA11979
PortalARIZONA11986

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.